Colregs Questions and Answers (Q & A)

Rule 7

Risk of collision

The answers can be found in the respective Rules and Paragraphs in the book"International Regulations for Preventing Collisions at Sea (Colregs) by Capt. Pierre Deseck and/or in the Colregs Presentation (on DVD), also by Capt. Pierre Deseck

Q = Question; A= Answer

Q 7-1
Define the term “risk of collision

A 7-1
Rule 7 and Par. 7.1, General
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Q 7-2
What do you understand by all available means appropriate to the prevailing circumstances ?

A 7-2
Rule 7 (a) and Par 7.2, All available means appropriate to the prevailing circumstances.
Click on all available means for a summary


Q 7-3
What precautionary measures shall the master take before proceeding to sea ?

A 7-3
SOLAS – Regulation 34.
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Q 7-4
Summarise the elements to be taken into consideration when planning the voyage.

A 7-4
Guidelines for voyage planning (IMO Resolution A.893(21).


Q 7-5
Which items should you consider in contemplating a voyage or passage ?

A 7-5
Guidelines for voyage planning (IMO Resolution A.893(21), Par. 2., Appraisal.


Q 7-6
Enumerate the factors that the detailed voyage or passage plan should include.

A 7-6
Guidelines for voyage planning (IMO Resolution A.893(21), Par. 3., Planning.


Q 7-7
Which factors should the master take into account when executing the voyage or passage plan ?

A 7-7
Guidelines for voyage planning (IMO Resolution A.893(21), Par. 4., Executing.


Q 7-8
Where should the voyage or passage plan be kept during the voyage ?

A 7-8
Guidelines for voyage planning (IMO Resolution A.893(21), Par. 5., Monitoring.


Q 7-9
Discuss the matter of fatigue on board ships.

A 7-9
Marine Guidance Note MGN (211 (M), Fatigue: Duties of Owners and operators under merchant shipping legislation.


Q 7-10
Which points should you consider with regard to the proper use of radar equipment to detect risk of collision ?

A 7-10
Rule 7 (b) and Par. 7.3, Proper use of operational radar.
Click on proper use of radar for a summary


Q 7-11
What do you understand by “close quarters situation” ?

A 7 -11
Par. 7.3.1, Appropriate choice of range scale.
Click on close quarters situation for a summary


Q 7-12
Which controls should be at their optimum settings to guarantee the proper operation of the radar ?

A 7-12
Par. 7.3.2, Proper setting of the radar.
Click on proper operation of the radar for a summary


Q 7-13
What should you do if you have to use a radar with which you are not acquainted ?

A 7-13
Par. 7.3.2, Proper setting of the radar.


Q 7-14
Discuss the choice of display.

A 7-14
Par. 7.3.3, Choice of appropriate display.
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Q 7-15
Define the term “plotting”

A 7-15
Par 7.3.4, Systematic plotting of observed echoes.
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Q 7-16
Comment the use of the CAS.

A 7-16
Par 7.3.4, Systematic plotting of observed echoes, Sub par. 2, Collision avoidance system (CAS).


Q 7-17
Define the term “ARPA”.

A 7-17
Par 7.3.4, Systematic plotting of observed echoes.


Q 7-18
What should you do if you detect there is risk of collision and you can only obtain scanty information ?

A 7-18
Rule 7 (c) and Par. 7.4, Scanty information.


Q 7-19
What should you certainly consider in determining if risk of collision exists ?

A 7-19
Rule 7 (d) (i) and Par. 7.5, Change of compass bearing.
Click on determining risk of collision for a summary


Q 7-20
Can an appreciable change of bearing be a certainty that risk of collision does not exist any more ?

A 7-20
Rule 7 (d) (ii).

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